excuse me if this has already been addressed but I didn't see it as I looked throught the forums. I've seen in a couple of different places pandahome being mentioned as the reason Moments have been locking up. As I ran into a little while ago myself. But thanks to a little bit of searching and the help of someone on here, I was able to reflash my moment. Luckily I have already used Astro to backup my apps and Sprite backup to backup everything else to my SD card. So if anyone has run into this problem there is a way to fix it without having to run to sprint (or where ever you got your phone) But since it is a "factory reset" I suggest you backup everything if it's not already too late. Random tech info provides links to the files needed as well as a step by step to set up the program.
Samsung Moment Random Tech Info
Samsung Moment Random Tech Info